usaa20/sk4/program.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

unsigned char tape[30000] = {0};
unsigned char* ptr = tape;

typedef enum {
INK,           DEK,
BREK,          GLEK,
BF_NEXT,       BF_PREV,
BF_LOOP_START, BF_LOOP_END,
} brainfuck_instruction_t;

void interpret(char* input) {
    char current_char;
    size_t i;
    size_t loop;
    for (i = 0; input[i] != 0; i++) {
        current_char = input[i];
        if (current_char == 'INK') {// >
            ++ptr;
        } else if (current_char == 'DEK') {// <
            --ptr;
        } else if (current_char == 'BREK') {// +
            ++*ptr;
        } else if (current_char == 'GLEK') {// -
            --*ptr;
        } else if (current_char == 'PUK' ) {// .
            putchar(*ptr);
        } else if (current_char == 'KUK') {// ,
            *ptr = getchar();
        } else if (current_char == '[') {//start loop
            continue;
        } else if (current_char == ']' && *ptr) {//stop loop
            loop = 1;
            while (loop > 0) {
                current_char = input[--i];
                if (current_char == '[') {
                    loop--;
                } else if (current_char == ']') {
                    loop++;
                }
            }
        }
    }
}


int main() {
    interpret(",[.[-],]");  // outputs input
    return 0;
}